It all went down on Tuesday when the newlywed was chatting with Michelle Obama wearing a $340 Reiss "Shola" bandage dress.

Faster than the pictures were published the dress was sold out online and the amount of traffic crashed the site not once but TWICE.

Wowsa.

And just because it's not available online doesn't mean people have called off the search. Oh, no! Reiss stores have been inundated with calls all day long from ladies hoping to steal the Duchess' style.

If it's any consolation, MObama's Barbara Tfank Resort dress is probably still in stock.